OENOTHERA macrocarpa [missouriensis]
(e-NOTH-er-a) (mak-roe-KAR-pa) | OENOMA3 |
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| Common Name: Missouri Primrose |
| Description: RHS Award of Garden Merit. Large, deep yellow flowers; sprawling plant with glossy, dark green leaves. |
| Zone: 4 |
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OENOTHERA macrocarpa 'Comanche Campfire'
(e-NOTH-er-a) (mak-roe-KAR-pa) | OENOCC3 |
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| Common Name: Evening Primrose, Sundrops |
| Description: 2001 GreatPlantsTM Introduction. The large, shiny silver, drought and sun resistant leaves are complimented by glowing ruby stems topped with huge, delicious yellow flowers until fall. Cutting propagated from an outstanding seedling grown from seed collected in Western Oklahoma by the GreatPlants for the Great Plains group of Nebraska. Limited supply after 4/15. |
| Zone: 4 |
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OENOTHERA macrocarpa subsp. fremontii
(e-NOTH-er-a) (mak-roe-KAR-pa) | OENOFR3 |
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| Common Name: Evening Primrose, Sundrops |
| Description: Large, light yellow flowers beginning in May; most have glaucous leaves, narrower than species. Drought tolerant plants, native to NE & KS. |
| Zone: 4 |
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OENOTHERA pilosella 'Yella Fella'
(e-NOTH-er-a) (py-LOH-sell-ah) | OENOYF3 |
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| Common Name: Evening Primrose, Sundrops |
| Description: Large, brilliant golden flowers open from bright orange buds. Intense green, hairy foliage turns reddish in fall. Blooms all summer. |
| Zone: 4 |
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OPHIOPOGON chingii 'Sparkler'
(oh-fee-oh-POE-gon) (ja-PON-ih-kus) | OPHISP3 |
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| Common Name: Lilyturf, Mondo Grass |
| Description: Fine-leafed dwarf with rich, deep green leaves adorned with sparkling white flowers followed by blue berries. A must for the small or miniature garden. Species corrected from japonicus. |
| Zone: 5 |
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OPHIOPOGON japonicus 'Pygmaeus'
(oh-fee-oh-POE-gon) (ja-PON-ih-kus) | OPHIPY3 |
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| Common Name: Lilyturf, Mondo Grass |
| Description: Miniature with tightly packed, rich green leaves. Slow growing. Use in the trough or dish garden. |
| Zone: 5 |
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OPHIOPOGON japonicus 'Silver Dragon'
(oh-fee-oh-POE-gon) (ja-PON-ih-kus) | OPHISD5 |
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| Common Name: Lilyturf, Mondo Grass |
| Description: White variegated selection. |
| Zone: 6 |
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OPHIOPOGON planiscapus 'Niger'
(oh-fee-oh-POE-gon) (plan-iss-KAP-us) | OPHINI5 |
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| Common Name: Black Mondo Grass |
| Description: RHS Award of Garden Merit. Distinctive, very dark purple foliage with pale lilac-pink flowers July-August. Slow growing edger, ground cover, or contrast plant with Hosta or other paler foliage plants. Best in part shade and moist soil, but will tolerate full sun. |
| Zone: 5 |
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ORIGANUM laevigatum 'Herrenhausen'
(oh-RIG-an-um) (lay-vih-GAY-tum) | ORIGHE1 |
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| Common Name: |
| Description: RHS Award of Garden Merit. Sub-shrub with small, aromatic leaves. Profusion of small, cerise-pink flowers and red-purple bracts. Spectacular in late summer and fall. |
| Zone: 5 |
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ORIGANUM laevigatum 'Herrenhausen'
(oh-RIG-an-um) (lay-vih-GAY-tum) | ORIGHE3 |
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| Common Name: |
| Description: RHS Award of Garden Merit. Sub-shrub with small, aromatic leaves. Profusion of small, cerise-pink flowers and red-purple bracts. Spectacular in late summer and fall. |
| Zone: 5 |
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ORIGANUM libanoticum
(oh-RIG-an-um) (li-ba-NO-ti-kum) | ORIGLI3 |
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| Common Name: Hopflower Oregano |
| Description: 2004 Plant Select®. Vigorous, trailing herb with hops-like bracts of lavender and chartreuse throughout the summer and fall. Looks best cascading over a raised bed, rock garden, or container. Needs well-drained site. |
| Zone: 4 |
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ORIGANUM rotundifolium 'Kent's Beauty'
(oh-RIG-an-um) (ro-tun-di-FO-lee-um) | ORIGKB3 |
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| Common Name: Kent's Dittany |
| Description: Semi-prostrate, branching stems covered with hops-like pods and lavender florets in summer and fall. Needs well-drained soil. Incredible in containers or growing over a boulder. |
| Zone: 6 |
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ORIGANUM x 'Amethyst Falls'
(oh-RIG-an-um) | ORIGAF3 |
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| Description: An outstanding, long blooming selection by Harlan from seed produced in the Kelaidis' garden several years ago. In addition to amethyst flowers flowing abundantly from ornamental, hops-like cones and attractive, textured, glaucous leaves this drought resistant plant's foliage fills the garden air with its exciting, spicy scent. |
| Zone: 5 |
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OROSTACHYS aggregeatus
(or-oh-STAK-ees) (ag-GREG-ee-a-tus) | OROSAG3 |
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| Common Name: Dunce Caps |
| Description: Neat, green, succulent rosettes from the Far East for the rock garden. White creamy flowers in late summer. No wet feet in winter. |
| Zone: 5 |
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OROSTACHYS iwarenge
(or-oh-STAK-ees) (iwa-renge) | OROSIW3 |
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| Common Name: Dunce Caps |
| Description: Choice, low, gray, succulent rosettes. |
| Zone: 5 |
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OROSTACHYS malacophyllus
(or-oh-STAK-ees) (ma-la-KO-fill-us) | OROSMA3 |
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| Common Name: Dunce Caps |
| Description: Very large rosettes of pale green with young pups on the underside.
An eye-catcher for the rock garden. |
| Zone: 5 |
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OROSTACHYS minutum
(or-oh-STAK-ees) (my-NEW-tum) | OROSMI3 |
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| Common Name: Dunce Caps |
| Description: A classy, petite, Hen & Chick-like succulent with narrow, pointed, fleshy blue leaves. Needs a well-drained site. |
| Zone: 6 |
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OROSTACHYS spinosus
(or-oh-STAK-ees) (spine-OH-sus) | OROSSP3 |
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| Common Name: Dunce Caps |
| Description: One of the finest. Similar to miniature Sempervivum and appears to have a white leaf margin. Stunning plant in the trough or rock garden. |
| Zone: 4 |
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OSTEOSPERMUM 'Avalanche' PP# 22,705
(oss-tee-oh-SPERM-um) | OSTEAV3 |
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| Common Name: Avalanche White Sun Daisy |
| Description: 2011 Plant Select®. Dazzling white flowers with a coppery backing from April through summer. Mats of lustrous, nearly succulent, evergreen foliage. Greater disease resistance and heavier bloom than other sun daisies. Propagation Prohibited. |
| Zone: 4 |
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OSTEOSPERMUM barberiae var. compactum
(oss-tee-oh-SPERM-um) (BAR-ber-ay) | OSTEPM3 |
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| Common Name: (PURPLE MOUNTAIN®) Sun Daisy |
| Description: 1998 Plant Select®. Purple, daisy-like flowers in early spring. |
| Zone: 6 |
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OSTEOSPERMUM x (LAVENDER MIST®)
(oss-tee-oh-SPERM-um) | OSTELM3 |
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| Common Name: Sun Daisy |
| Description: 1998 Plant Select®. Large, 3", lavender-purple, daisy-like flowers from early spring to fall. |
| Zone: 6 |
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OTHONNA capensis
(o-THON-a) (ka-PEN-sis) | OTHOCA3 |
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| Common Name: Little Pickles |
| Description: Blue-green, cylindrical leaves with stems of bright yellow daisies above foliage. A succulent Senecio selection for the sunny rock garden brought from Drakenberg Mountains of South Africa by Denver Botanic Garden's Panayoti Kelaidis. |
| Zone: 5 |
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OXALIS crassipes 'Rosea'
(oks-AL-iss) (KRASS-ih-peez) | OXALRO3 |
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| Common Name: Strawberry Oxalis |
| Description: Showy, rose-pink flowers on this hardy oxalis for shade. Limited supply. |
| Zone: 5 |
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PACHYSANDRA terminalis
(pak-ih-SAN-drah) (ter-min-AL-iss) | PACHTE3 |
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| Common Name: Spurge |
| Description: Excellent ground cover for shade; forms a dense, shiny carpet of foliage. |
| Zone: 4 |
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PACHYSANDRA terminalis
(pak-ih-SAN-drah) (ter-min-AL-iss) | PACHTE1 |
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| Common Name: Spurge |
| Description: Excellent ground cover for shade; forms a dense, shiny carpet of foliage. |
| Zone: 4 |
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PACHYSANDRA terminalis
pak-ih-SAN-drah)(ter-min-AL-iss) | PACHTE5 |
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| Common Name: Spurge |
| Description: Excellent ground cover for shade; forms a dense, shiny carpet of foliage.
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| Zone: 4 |
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PACHYSANDRA terminalis 'Green Carpet'
(pak-ih-SAN-drah)(ter-min-AL-iss) | PACHGC5 |
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| Common Name: Spurge |
| Description: RHS Award of Garden Merit. Broader leaves that are darker and shinier green; plants are more compact and slower spreading than species. Choice variety.
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| Zone: 4 |
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PACHYSANDRA terminalis 'Green Carpet'
(pak-ih-SAN-drah) (ter-min-AL-iss) | PACHGC3 |
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| Common Name: Spurge |
| Description: RHS Award of Garden Merit. Broader leaves that are darker and shinier green; plants are more compact and slower spreading than species. Choice variety. |
| Zone: 4 |
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PACHYSANDRA terminalis 'Green Sheen'
(pak-ih-SAN-drah) (ter-min-AL-iss) | PACHGS3 |
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| Common Name: Spurge |
| Description: Smaller, very glossy, dark green leaves. Slow-spreading variety; most heat tolerant selection. |
| Zone: 4 |
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PACHYSANDRA terminalis 'Green Sheen'
(pak-ih-SAN-drah) (ter-min-AL-iss) | PACHGS5 |
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| Common Name: Spurge |
| Description: Smaller, very glossy, dark green leaves. Slow-spreading variety; most heat tolerant selection. |
| Zone: 4 |
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